package day2;
/*
 * 输出一下结构
 * 1
 * 12
 * 123
 * 1234
 * 12345
 */
public class For {
	public static void main(String[] args) {
		for (int i = 1; i <= 5; i++) {
			for (int j = 1; j <= i; j++) {
				System.out.print(j);
			}
			System.out.println();
		}
	}
}
